Generate dart:html bindings for Dartium as well as Frog. All unittests now pass (or are disabled fo…

client/html/generated/html/frog/TreeWalker.dart

+
+class _TreeWalkerImpl implements TreeWalker native "*TreeWalker" {
+
+  _NodeImpl currentNode;
+
+  final bool expandEntityReferences;
+
+  final _NodeFilterImpl filter;
+
+  final _NodeImpl root;
+
+  final int whatToShow;
+
+  _NodeImpl firstChild() native;
+
+  _NodeImpl lastChild() native;
+
+  _NodeImpl nextNode() native;
+
+  _NodeImpl nextSibling() native;
+
+  _NodeImpl parentNode() native;
+
+  _NodeImpl previousNode() native;
+
+  _NodeImpl previousSibling() native;
+}